and pakistan. pakistan's president met with iran's supreme leader in tehran today. the iranian leader said the u.s. is the biggest enemy to pakistan's national unity. the u.s.-pakistan relationship has been on a downward spiral since the raid that killed osama bin laden in pakistan 3 months ago. >>> the crisis in syria intensifying. the syrian government unleashed a deadly crackdown on rebel protestors and calls continue to the syrian president to step down and this is lena ninan with the latest. >> reporter: at least 28 people were killed in demonstrations on friday but despite the government crackdown, it was the largest show of protestors since the uprisings began in march. according to areas where the government brutality has been the most intense. this shows the security forces are having a tough time keeping the revolt contained. they say since the uprising began in march, 1600 people have been killed and most of them unarmed protestors. on saturday, shops were closed as people attended funerals of those killed on friday. and tips of thousands of protectors to